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Where 57651 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 57651 into a pocket calculator and turn it upside down: ISgLS — not quite a word, sorry.
- ➕ As a number, 57,651 = 3 × 11 × 1747. Its digits add up to 24, a total 2,425 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000100110011 - 🏠 Its numerical neighbours: 57650 (Ralph, SD, 24 mi away) and 57652 (Ridgeview, SD, 117 mi away).
- 🔄 Backwards, 57651 becomes 15675 — and that is a real ZIP code: Penn, PA, 1,231 miles away.
- 👥 24 other ZIP codes are made of exactly the same digits (15675, 15756, 15765, 17565, 51576, 55716, …). The farthest-flung twin is 17565 in Pequea, PA, 1,403 miles away.
- 🧭 Farther north than 92% of all ZIP codes, and farther west than 81%.
- 🎯451 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57651 and you would come out at 45.48°S, 76.97°E — 413 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 41m of daylight. Shortest: 8h 42m.
- 📏 At 443.8 square miles of land, 57651 is bigger than 97% of ZIP codes — room for about 337 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 191This ZIP191 |
|---|---|
| Households | 54This ZIP54 |
| Housing units | 83This ZIP83 |
| Median age | 33.1This ZIP33.1South Dakota38.0US 38.9 |
| Median household income | $94,559This ZIP$94,559South Dakota$75,081US $80,734 |
| Median home value | $212,500This ZIP$212,500South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 29.0%This ZIP29.0% |
| Mean commute | 19.3 minThis ZIP19.3 min |
| Population density | 0.4 / sq miThis ZIP0.4 / sq mi |
Land area
| Land area | 443.79 sq miThis ZIP443.79 sq mi |
|---|---|
| Water area | 1.29 sq miThis ZIP1.29 sq mi |
Counties 57651 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Harding County | 85.0% |
| Perkins County | 15.0% |
ZIP codes near 57651
| ZIP | City | Distance |
|---|---|---|
57649 | Prairie City, SD | 9.0 mi |
57650 | Ralph, SD | 24.5 mi |
57620 | Bison, SD | 24.9 mi |
57640 | Lodgepole, SD | 25.7 mi |
57720 | Buffalo, SD | 27.0 mi |
57776 | Redig, SD | 28.4 mi |
57755 | Ludlow, SD | 31.0 mi |
57758 | Mud Butte, SD | 36.3 mi |
58653 | Scranton, ND | 42.6 mi |
57760 | Newell, SD | 42.8 mi |
Find every ZIP code within 10 miles of 57651 →
Questions about this ZIP code
Where is ZIP code 57651?
57651 is in Reva, South Dakota, in Harding County. Its published point location is 45.4769, -103.0344.
What county is 57651 in?
57651 spans 2 counties: Harding County and Perkins County. Most of it falls in Harding County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What time zone is 57651 in?
57651 uses America/Denver.
How many people live in 57651?
About 191 people live in ZIP code 57651, in 54 households, at 0.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 57651?
$94,559 a year, against $75,081 across South Dakota.
What ZIP codes are near 57651?
The closest are 57649 (9 mi), 57650 (24.5 mi), 57620 (24.9 mi), 57640 (25.7 mi) and 57720 (27 mi).
Is 57651 a PO Box ZIP code?
57651 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57651 ZIP Code — Reva, South Dakota (Harding County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57651
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57651.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.